The word "Calvinna" is spelled with a "v" instead of a "b" due to the pronunciation of the word in the original language it comes from. The IPA phonetic transcription of the word is /kæl-ˈvɪn-ə/ which indicates that the "v" sound is more prominent than the "b" sound. The word is derived from the name Calvin and is often used as a feminine variation of the name. The unique spelling adds a distinctiveness to the name and helps to set it apart from other variations of the name.